Gate-valve.



Nur.A sesoss.

(No Model.)

THE NDR I5 PETE Witnesses UNITED STATES PATENT 50i-TICE.

' .DAVID LEMLEY, or NEW ORLEANS, LOUISIANA.

GATE-VALVE.

SPECIFICATION forming part of Leners Patent No. 693,036, dated February1 1, 1902-.

Application tiled March 16, 1901. SerialNo. 511447. (No model.)

To all whom, t may concern:

Be it known that I, DAVID LEMLEY, a citizen of the United States,residing at New Orleans, in the parish of Orleans and State ofLouisiana, have invented a new and useful Gate-Valve, of which thefollowing is a speciication.

My invention is an improvement in sliding gate-valves, and has for itsobject to provide a Simple and efficient form of casingin which thevalve is held and designed to work.

Another object is to provide a casing having a sediment-chamber whichcan be cleaned without causing the water to be turned olf from the pipewhen the chamber is opened, the only requirement being to close thevalve, which also cuts olf communication between the casing and chamber.

Another and important feature of my invention is the few parts of whichthe casing is constructed and the manner of locking the parts together,as will be understood from the following specification and claims,reference being had to the drawings, in which- Figure I is a face Viewof my improvement. Fig. 2 is a longitudinal section of the same, takenon the line 2 2 of Fig. 1. Fig. 3 is a transverse section on the line 33 of Fig. l; and Fig. 4 is a plan view of the casing, the valve-stem andguide-rod being shown in section.

In the drawings, A designates the valvecasing, having the usual interiorchamber formed therein and pipe connections a, a, formed in the oppositefaces thereof. A recess a' is formed in the top, intowhich is designedto it the lower end of a hood B, held in position upon the casing bybolts C C, passing through lugs CL2 and o, formed, respectively, on thesides of the casing and hood. The interior sides of the casing areprovided with guideways a3, one side c4 of which is arranged vertically,while the opposite side a5 of each guideway is arranged upon an obliqueline forming a tapered guideway, the purpose of which will appear lateron. Within the guideways is designed to operate a sliding gate-valve D,whose opposite faces are made to conform to the shape of the guideways.It will be seen that as the valve is lowered to close communicationbetween the connections a c the tapered face of the valve engaging thesimilarly-arranged face d5 of the guideway causes the valve to be pushedfor-- ward against the opposite face of the guideway, thereby causing apressure of the valve upon its seat and preventing any leakage whatever,and as the valve becomes worn the Wear is taken'up by a further downwardmovement of the valve, as will be clearly understood. The lower end ofthe valve protrudes through an opening CLG, formed in thelower end ofthe casing, which communicates with a sediment-chamber 0,7, that isdesigned to be closed by a closure-plate E. The outer ends of this plateare provided with apertures c, arranged in alinement with the aperturesin the lugs a2 and l), and are adapted to receive the bolts C to holdthe closure-plate in position. The hood is provided with a chamber b toreceive the valve when the latter is raised to open communicationbetween the connections, the sides of the chamber b being flush with theguideways of the casing, which provides an unobstructed passage for thevalve. The upper'end of the hood B terminates in a neck portion B2,having a guideway b2 for the stem D' of the valve and a stuffing-box b3,into which fits the sleeve of a gland F, the latter being held inplace'by bolts f.'

It will thus be seen that I provide an eX'- ceedingly simple form ofcasing composed of but few parts that require only two bolts to holdthem in position.

For operating thepval ve I provide a lever Gr, which is pivotallyconnected at an intermediate point to the upper end of the valvestem andat its eXtreme end is pivoted to a guide-rod H, which is held upon oneof the lugs b of the hood.

I do not wish to limit myself to the manner of operating the valve, asany suitable means may be employed.' p'

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is-

1. In a sliding gate-valve the combination of a casing composed of anupper and lower section each of which having perforated lugs extendinglaterally therefrom, the said lower section having a recess formed inits upper surface and adapted to receive the lower end of the uppersection, thev said lower section also having a recess in its lower end,a plate IOO for closing said recess, bolts for locking the said sectionsof the easing and plate together and a Valve adapted to operate in thesaid easing, substantially as shown and described.

2. In a'sliding gate-valve the combination of a casing composed of twosections eaeh of which having perforated ings extending laterallytherefrom, one of said lugs upon the upper section being bifuroated, asupporting- 1o rod pvoted to the said bifureated lug, a lever connectedto the said rod, and adapted to be connected to a valve operating withinthe said easing, a plate connected to the lower casing,and boltsengaging said lugs and plate, substantially as shown and described.

DAVID LEMLEY1 Vitnesses:

T. J. FORD, N. 13. TRIST.

